The Lens,winker is the most widely applied product in the PK50SM WALLAROO 2001 (1) BELGIUM / SEL WINKER ( four times ).
Some items from this specific schematic: Nut,hex 6mm, Stay,rr.winker, Bulb (12v10w), Screw,tapping,4x3.
The lowest price component in this Winker parts-list fiche is the Screw,tapping,4x3.